Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa0bb96271d7967…

MALICIOUS

PDF

98.6 KB Created: 2021-07-17 13:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: dfdfa2ba188fb03985069d276240a12a SHA-1: 1bef33a2cd857835f58edeeb9ef480ba25cbe846 SHA-256: 9aa0bb96271d7967760611231949698b07f27193ca9ddb5eb66e2bb9ee83708a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm pointing to compromised WordPress sites and potentially disposable hosting. The presence of embedded URIs, including one using an IP literal, suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bandai-k.com/userfiles/file/ledoromela.pdf In PDF document text
    • http://vigova.com/Images_upload/files/bixovozidigalewenizejak.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160789cf47c794---loranebupik.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608f81039dc07---65097534669.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/36576515512.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/35826952542.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/864e4b8388bffbc9b26d6ab3bc545337/negureferukej.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/3eebefda772c2322d05aa1842243ea26/9880875803.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/92286212961.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/95018720526.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb3a18a3ba---29801451985.pdfPDF link annotation
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/27da5b1bad031e350acfd84c82e581ba/kirasajanaxu.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c604fb39b6f---42522790627.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/37219001228.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/52773498148.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/25256557560.pdfIn PDF document text
    • https://x-software.cz/data/file/87042414321.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/bbc81f5aee0d8491cf08c2e4e29dd831/subudulagakemezijo.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/suv1g1l5badkuq9nm6bn2q1hl6/levototud.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210605_021207.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b621e8abbb1---79192387975.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce786b5d1---woxajamujetu.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d732c9312f4---zubozofidaxavevunixadi.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/sufumamoparosajisevagufan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=fortnite+for+android+tabletPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 10296 bytes
SHA-256: 412377bf6a64deabf196231d4a29d5703d74e110280c3a47e60d7b5bfbe5357b
font_01_sfnt_off00011769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11769 18068 bytes
SHA-256: f034c8ff4e831ab54425f8abc94c327cd96fcae1808512459e5b42f4436d31a3
font_02_sfnt_off000133d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D8 18744 bytes
SHA-256: 2e41b687c2f2c4dba2e3d4cc152ce6d1eec69bd0960f509d0b76b071ef80aa1f
font_03_sfnt_off000162f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.